Low-temperature photoluminescence of CdTe:Fe single crystals for tunable lasers operating in mid-infrared spectral range

IF 0.7 4区 物理与天体物理 Q4 OPTICS
D. A. Zazymkina, D. F. Aminev, V. S. Krivobok, Yu. V. Korostelin, V. I. Kozlovsky
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Abstract

We study low-temperature photoluminescence of CdTe:Fe single crystals in the near-IR range at Helium temperatures. We establish that doping with 4 · 1018 cm−3 iron concentration leads to a decrease of the band gap by 8 ± 1 meV compared to non-doped CdTe. We show that, in the spectral range of 1.2–1.6 eV, the luminescence of crystals is mainly defined by Hydrogen-like donors and two types of acceptors with binding energies of 149 ± 5 meV and 45 ± 2 meV. In addition, we detect the luminescence bands with maxima of 1.1 eV and 0.95 eV in the longer wavelength region. The characteristic decay time for each of the bands is 0.386 ms at 7 K. The observed bands are ascribed to intracenter luminescence corresponding to the 3T1(3H) → 5E(5D) and 5T2(5D) → 5E(5D) transitions between Fe2+-ion inner shells. Detection and identification of these bands allows the use of the near-IR range for the study of optically active iron ions in promising laser media based on CdTe:Fe.

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来源期刊
CiteScore
1.50
自引率
22.20%
发文量
73
审稿时长
2 months
期刊介绍: The journal publishes original, high-quality articles that follow new developments in all areas of laser research, including: laser physics; laser interaction with matter; properties of laser beams; laser thermonuclear fusion; laser chemistry; quantum and nonlinear optics; optoelectronics; solid state, gas, liquid, chemical, and semiconductor lasers.
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